Have you ever met a "friend" (someone whom you talked to before) and s/he tried to avoid any eye contact with you or say hi to you? In other words, s/he treated you as if you were invisible. I have, and I find that hard to understand.
I mean, we're all adults, and even if you hate someone so much, would you still show some basic kind of politeness? Honestly, I've never hated someone so much that I don't even want to say hi to him/her.
Or am I being phony for saying hi to people whom I don't really like? Educate me if you don't agree.. (~___~ )